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Synthesis of N-heterocyclic carbene palladium(II) bis-phosphine complexes and their decomposition in the presence of aryl halides

journal contribution
posted on 2023-05-16, 21:23 authored by Magill, AM, Brian YatesBrian Yates, Cavell, KJ, Skelton, BW, White, AH
Methylpalladium(ii) carbene complexes of the type [Pd(NHC)Me(P-P)]BF 4 (NHC = N-heterocyclic carbene, P-P = chelating phosphine) have been synthesised, the complex [Pd(tmiy)Me(dcype)]BF4 (tmiy = 1,3,4,5-tetramethylimidazol-2-ylidene, dcype = 1,2-bis(dicyclohexylphosphino) ethane) being characterised crystallographically. Complexes bearing the tmiy ligands were shown to decompose in an analogous manner to complexes bearing monodentate phosphine ligands, with the rate of decomposition being nominally linked to the size of the chelate ring. The decomposition of these complexes in the presence of aryl halides - expected to yield Pd(Ar)X(P-P) - was studied and shown instead to yield PdX2(P-P) and [Pd(tmiy)X(P-P)]BF4. Additionally, Pd(Me)X(P-P) and Pd(Ar)X(P-P) were observed in some cases. Intermolecular cross-over reactions between the starting complex and Pd(Ar)X(P-P) were found to be the source of these unexpected products. © The Royal Society of Chemistry 2007.

History

Publication title

Dalton Transactions

Volume

2007

Issue

31

Pagination

3398-3406

ISSN

1477-9226

Department/School

School of Natural Sciences

Publisher

Royal Society of Chemistry

Place of publication

Cambridge

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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